ASUNCION, Paraguay - Paraguay asked international health authorities on Thursday to supply 600,000 doses of vaccine for yellow fever after the first cases were detected in the country in 34 years. Antonio Barrios, a public health official, said the government had 100,000 vaccine doses but wanted to bolster stocks as a "reserve measure" after five cases of yellow fever were detected this week in a central farming region. Barrios said the request was being made to the Pan American Health Organization. An expert on vaccination issues at the Washington-based offices was not immediately available for comment. Barrios said the five...